your boat looks capable of going offshore just dont go out in big swells but no one does that normally anyway the one thing that you have to worry about is your motor is it a 2 stroke because trust me old 2 strokes are not very reiable motors and if you get struck in a bad swell you want a motor that you know won't stall or breakdown on you easily and you know that you can start easily i have seen countless old and new carberated 2 strokes take hours to start plus they eat heaps of fuel. How big is your fuel tank as well you got to make shore that you can get to your spot and back with about a quarter of a tank left. Your motor is one of the most improtant tools for going offshore it gets you A to B if you dont trust it then dont go offshore. Good motors that are very reiable are evinrude etecs i know i ve got one myself, yamaha four strokes, suzuki four strokes but i would reconmend an etec alot more power speed and more fuel efficent and you only have to service it once every three years but if you dont have the money to buy a new motor dont worry about it get a motor you can trust to be reilable that suits your price range.